Should I buy iphone 5 or wait for the next iphone?

So, I have a galaxy note N7000 and I want to upgrade it. Now, the price of iPhone 5 in my country is more than 1055 USD as compared to Galaxy S4 which is of 600USD and HTC one which is of 610 USD. I have an iPad 4 Wi-Fi + cellular and like iOS more than Android due to huge amount of quality apps and iTunes and iBooks. Also, I don't like the cheap feel of S4. The only problem that is stopping me from buying an iPhone 5 is the small screen size. I know 4.0 inch is quite good for a smartphone but after using Note for about 1 year and 8 months and most of my family members and friends having a phone by samsung or lg that is >4.5 inch screen. IPhone 5 does seem a little tiny. Also, none of my friends or anyone I know has an iPhone due to its high price. I'm the only who doesn't have a problem with the higher price. Is it possible that the next iPhone is bigget than iPhone 5.It doesn't seem likely due to Apple sticking to the screen that they chose for iPhone for so many year and finally giving a.5 inch increase in iPhone 5's screen.So, Should I buy iphone 5 or wait for the next iphone? Also is it possible that apple launches the next iPhone before September as then I will have to wait December?

Wait! All you know is that the next Iphone might even come out in July, Apple don't have a set date anymore, they release it whenever they feel it is the right time. Remember last year they RELEASED THE IPAD 4 8 MONTHS AFTER IPAD 3.So imo you should wait, unless you are really desperate for an Iphone now then get it.